Cyclic carbonates consist of five-membered rings, six-membered rings, seven-membered ring carbonates, in addition to macrocyclic carbonates with greater than seven-membered rings, amongst which propylene carbonate and ethylene carbonate are among one of the most widely utilized. Ethylene carbonate is a phenomenal polar high-boiling factor solvent along with surfactant resources, widely made use of in plastics, printing in addition to dyeing, polymer synthesis, gas separation as well as electrochemistry as well as likewise various other areas.
Propylene Carbonate Property
-55 °C (lit.)
240 °C (lit.)
1.204 g/mL at 25 °C (lit.)
0.13 mm Hg ( 20 °C)
Store below +30°C.
3.92[at 20 ℃]
7.0 (200g/l, H2O, 20℃)
240 g/L (20 ºC)
Application of Propylene Carbonate
Propylene carbonate is a high-boiling and also very polar natural solvent with superb efficiency, and also is also an essential natural chemical. It has been commonly utilized in organic synthesis, gas splitting up, battery dielectric, as well as steel extraction. It can be used as a plasticizer, rotating solvent, dispersant for water-soluble dyes and also pigments, oily solvent, olefin and aromatic hydrocarbon extractant, used as a decarbonization solvent in nitrogen plant food manufacturing, and utilized as an electrolyte in second-generation lithium-ion batteries to shield graphite anodes. If there is research and development of an electrolyte with propylene carbonate as the main solvent, it entails lithium-ion battery electrolytes.
Has lithium salts, organic solvents as well as additives; organic solvents include propylene carbonate and also chain carbonates; additives include film-forming additive An and also additive B for preventing propylene carbonate co-embedding; the make-up by mass percentage is 10% to 18% of lithium salt, 25% to 60% of propylene carbonate, 15% to 60% of chain carbonate, 0.5% to 5% of additive A, and 0.1% to 10% of additive B. Making use of sulfite as an additive in the electrolyte of lithium-ion batteries, since sulfite has a high decrease capacity, which is higher than the decomposition possibility of propylene carbonate, throughout the first billing procedure, sulfite forms a secure as well as dense SEI film externally of graphite prior to propylene carbonate decays, effectively inhibiting the propylene carbonate solvent from embedding right into the graphite layer together with lithium ions, and properly boosting the initial discharge ability and also cycle life of the battery.
Furthermore, propylene carbonate is additionally an efficient desulfurization and decarbonization (carbon dioxide) solvent, which is made use of in commercial industries such as gas filtration, ammonia raw material gas filtration and hydrogen production. An additional new use of it is for timber bonding, for example, it is blended with isocyanate in a particular proportion as a wood adhesive. Recently, make use of propylene carbonate as well as methyl alcohol to carry out the response of transesterification synthesis dimethyl carbonate, can prepare dimethyl carbonate by propylene carbonate, since dimethyl carbonate has a wide range of uses, the demand is huge, so likewise indirectly widen the purposes of propylene carbonate.
Propylene carbonate is non-corrosive, so it is utilized as a solvent in lipsticks, skin cleansers, eye shadows and mascaras.
Because the synthesis innovation of 1,2-propanediol is fairly mature, as well as the premium and outcome of the product are fairly consistent, for that reason, there are a number of records on the synthesis of propylene carbonate making use of propylene glycol as the major raw material.
1) Propylene glycol-phosgene method: The earliest commercial preparation work of propylene carbonate was the synthesis reaction of 1,2-propanediol and also phosgene.
Because phosgene is an incredibly toxic substance, it sets off serious damage to individuals along with the ambience; additionally, the generation of spin-off hydrochloric acid not just reduces the atom financial environment of the treatment, however likewise elevates the procedure financial investment expense as a result of the rust of devices by hydrochloric acid. For that reason, the regulations is presently prohibited.
2) Propylene glycol-urea strategy The program of urea and 1,2-propanediol to synthesize propylene carbonate has in fact been studied a great deal extra in China. When propylene glycol reacts with urea to manufacture propylene carbonate, the primary step is to create aminocarbonate, as well as the 2nd step is deamination as well as cyclization of aminocarbonate to develop the target thing propylene carbonate, accompanied by the generation of spin-off ammonia. The response troubles provided in the license of preparing propylene carbonate with urea as well as propylene glycol reported earlier are light, as well as the return of the target item is rather high. The stimulants presented are organotins, which are rather dangerous.
Changing to a strong base catalyst can lower the poisoning of the process. In the exposure of a solid base, such as zinc oxide, the response temperature level is 100-200 ° C, nitrogen gas exists, as well as after a specific time period, the return of propylene carbonate determined by urea can reach 99%. When the composite calcium oxide energizer is used, under reduced stress and anxiety, the temperature is 150-160 ℃, the conversion rate of urea is 95% -98%, the selectivity of propylene carbonate is 90% -98%, along with the stimulant can be recycled.
Propylene carbonate was synthesized from urea as well as additionally propylene glycol with essential magnesium carbonate calcined MgO as a vehicle driver. The return of computer system was greater than 90% after 3 humans resources of action at a feedback temperature level of 170 ° C. Utilizing inorganic lead as well as zinc materials as heterogeneous chauffeurs, the action temperature is 160 ℃, the reaction time is 6 h, the yield of propylene carbonate is 98% based upon urea; the reaction item in addition to the stimulant are easily divided. Utilizing iron-zinc oxide as energizer, the return of propylene carbonate was 78% after feedback at 170 ℃ for 2 h. The primary energetic part of the vehicle driver is ZnO, in addition to the catalytic task is advertised by the joint action of ZnO as well as also ZnFe2O4. The expense of propylene carbonate manufactured by propylene glycol-urea method is fairly reduced, and likewise it has particular process resources advantages.
3) Propylene glycol-carbon dioxide method Co2 is used in this reaction treatment. Carbon dioxide is a greenhouse gas. As a result of human jobs, the emphasis of carbon dioxide on the planet’s surface has really boosted. Using carbon dioxide as a raw material and repairing it right into chemicals is a green synthesis idea, as well as also useful records have actually been seen. Although the carbon dioxide made use of in lots of existing research study studies does not come straight from exhausts, the idea is furthermore thought about to be eco-friendly. The stimulants utilized in this strategy are alkali steel salts or alkaline planet steel salts, among which potassium carbonate has high catalytic task. In a homogeneous catalytic system, the return of propylene carbonate can reach 12.6%.
So as to get over the problems of product separation and additionally driver recycling set off by uniform catalytic reactions, potassium carbonate was loaded on triggered carbon for heterogeneous catalytic feedbacks. The outcomes disclosed that the selectivity of things was improved. Solvent acetonitrile was used in the artificial process of this method, which lowered the level of greening of its process. Organic tin compounds, such as Bu2SnO or Bu2Sn( OMe) 2, can likewise militarize the response of 1,2-propanediol as well as carbon dioxide under supercritical problems to produce propylene carbonate.
The enhancement of a co-solvent or the presence of a drying out rep is beneficial to the development of the item and likewise the improvement of the return. Throughout the response of 1,2-propanediol and additionally co2, water is generated, which lowers the application cost of atoms in the feedback procedure, as well as additionally the item will certainly be hydrolyzed, so the return of th
e item will certainly be prevented by water. This is a huge problem to be resolved in the process of recognizing the automation of the procedure.
4) Exchange technique of propylene glycol and additionally ester The prep work of propylene carbonate can be attained by transesterification with 1,2-propanediol and additionally diethyl carbonate or dimethyl carbonate.
Making use of alkali steel or alkaline earth steel as a catalyst, reacting at 144 ℃ for 12 h under routine stress, the return of propylene carbonate is 88%. If dibutyl tin dilaurate as well as also a portion of strong base are utilized as energizers for the transesterification reaction, xylene is used to reflux to manage the feedback temperature level, as well as additionally the byproduct ethanol is consistently fractionated, to ensure that the treatment actions can be reduced. However, due to the truth that the raw products utilized in this technique are reasonably pricey, in addition to the stimulant organotin is sensibly harmful, it is not an optimal greening procedure.
The enhancement and likewise cyclization of propylene oxide as well as likewise co2 to generate propylene carbonate is an exothermic as well as volume-shrinking response. As a result, decreased temperature and additionally high pressure problems contribute to the reaction. As a result of the reality that it is an enhancement feedback, the atomic economic climate of the treatment can theoretically get to 100, yet the actual circumstance is linked to the catalytic system used.
Catalytic systems primarily include uniform catalytic systems and heterogeneous catalytic systems. In the uniform catalytic system, the challenging driver can militarize the feedback of propylene oxide along with carbon dioxide to generate propylene carbonate, nonetheless its downside is that the concentration of the stimulant utilized is reasonably high and the reaction return is rather reduced. Quaternary ammonium salt, quaternary phosphonium salt as well as likewise alkali steel salt catalyst have high catalytic activity for the improvement reaction of propylene oxide and also co2, and also the conversion price is relatively high.
A kind of uniform steel ion made complex vehicle driver, code-named MC-3, catalyzes the reaction of propylene oxide as well as co2 under the troubles of reaction temperature degree 135 ℃ along with stress and anxiety 3 MPa, as well as the yield of propylene carbonate is above 94%. Additionally, the alkali metal salt catalyst can similarly catalyze the synthesis feedback of propylene carbonate under the promotion of macrocyclic crown ether and so forth. As a result of the fairly strong poisoning of macrocyclic crown ethers, the useful value of this artificial technique is reduced.
About Products: If you need Propylene carbonate as a cosmetic raw material, please contact our service staff directly, we will provide you with high-quality products at the best price. As an experienced Propylene carbonate manufacturer and supplier, ZSpharmac will provide Propylene carbonate raw materials for customers all over the world for a long time. Over the years, the company has been adhering to the spirit of “integrity management, strict quality control, customer first”, and has won unanimous praise from domestic and foreign customers.
Company Profile and Corporate Culture
ZhiShang Chemical is owned by ZhiShang Group is a professional new-type chemicals enterprise combined into research and development, production and sales .
The company’s competitive product is pharmaceutical raw materials and intermediates (especially carbohydrate derivatives Series), In recent years, the company has made a major breakthrough in food and feed additives, plant extraction, industrial chemicals industry .
The company insists on the spirit of “sincere management, strict quality control, customer as god” , get consistent high praise from customers at home and abroad.
OUR MISSION Help China Chemicals to benefit the happiness of human life OUR VISSION Become the most trusted chemical supplier in the world OUR BUSINESS PHILOSOPHY Striver – oriented, enrich employees, customer first, deep service, seek development OUR VALUES Be prepared for danger in times of peace, forge ahead actively, unity and cooperation, and be brave to fight
The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.
“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.
Business Type: Manufacturer
Product Range: Cosmetic raw materials
Products/Service:Cosmetic raw materials (flavors and fragrances,antioxidant products, moisturizing and hydrating, whitening agents, cosmetic additives)
Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.
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We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.
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Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.
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Different quantity has different discount.
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